The secret to mental toughness? Why fasting is the workout your mind has been waiting for

A significant moment in spiritual history occurred on February 18, when a rare coincidence saw both Ramadaan and Lent begin on the very same day.

This convergence, which last occurred in 1993, highlights both the diversity and shared values of global traditions. 

Yet, beyond the spiritual observances, fasting in any form offers profound lessons about mental fitness, resilience, and the art of restraint, a universal practice that transcends faith and culture.

Fasting, whether for religious, health, or personal reasons, is not just about abstaining from food. It’s a mental and emotional training ground that sharpens discipline, recalibrates focus, and teaches us to sit with discomfort. 

Neuroscience-driven mental fitness coach and endurance athlete Liezel van der Westhuizen believes the practice of fasting offers insights into modern mental fitness that anyone, regardless of their beliefs, can benefit from.

“Fasting is one of the oldest forms of cognitive training," explains Van der Westhuizen. It strengthens the brain’s ability to pause, regulate impulses, and act from intention instead of emotion. That’s mental stamina."

The neuroscience of restraint  

In today’s overstimulated world, where constant notifications and instant gratification dominate, the act of restraint is a radical and transformative choice. 

Research shows that fasting or any intentional pause from habitual behaviour activates measurable cognitive processes that improve focus, emotional regulation and overall mental clarity. 

Recalibrating the reward system

Modern life bombards us with dopamine spikes: the thrill of a social media notification, the quick hit of a sugary snack, or the rush of impulse purchases. These repeated highs overstimulate the brain’s reward pathways, creating a cycle of impulsivity.

Fasting acts as a dopamine reset, allowing the brain to recalibrate. It helps reduce impulsivity and encourages long-term focus. 

Behavioural neuroscience has shown that when we step away from instant gratification, be it social media scrolling or midnight snacking, we strengthen the brain’s executive control networks in the prefrontal cortex.

“Much like addiction, we must control the thing that gives us bliss, not let it control us," she explains.

"Temporary restraint helps you regain that control in a sustainable way.”

Building identity-based discipline

Mental fitness isn’t just about willpower; it’s about identity. Choosing discomfort voluntarily reinforces a self-concept grounded in control and capability.

“Every time you override an impulse, you reinforce the belief: I am someone who can handle discomfort," says Van der Westhuizen. This shift from reactive to intentional behaviour is what makes restraint sustainable.” 

Strengthening emotional endurance

The first challenge of fasting or any form of restraint is rarely physical. It’s emotional. Irritability, frustration, and urgency surface when we’re denied what we’re accustomed to. Learning to sit with that discomfort without reacting strengthens emotional regulation pathways in the brain.  

“This isn’t deprivation,” she clarifies. “It’s nervous system training. Restraint builds emotional endurance, which is critical for navigating both personal and professional challenges." 

The principles of fasting extend far beyond the personal. In high-pressure environments like sales and leadership, emotional impulsivity can undermine strategy and success.

“The professional who can pause and regulate their emotions rather than react defensively makes better decisions,” says Van der Westhuizen. 

“Restraint creates clarity, and clarity drives stronger negotiations, better judgment, and higher long-term performance."

A mental fitness reset for March  

March, traditionally a month of fasting and reflection across multiple cultures, offers the perfect opportunity for a mental reset. Van der Westhuizen encourages professionals and individuals alike to embrace this time as a chance to train their mental stamina.

Instead of focusing solely on food deprivation, she suggests experimenting with other forms of intentional restraint:

• Reduce instant email responses.
• Prioritise single-tasking over multitasking.
• Pause before defensive communication.
• Limit doom scrolling and social media time.
• Say “no” without over-explaining; a complete sentence in itself.

Each act of restraint strengthens cognitive control and emotional resilience, making individuals more present, focused, and intentional in their daily lives.

Fasting offers more than just physical benefits like weight loss or detoxification:

• Emotional regulation as a brake: Fasting trains your prefrontal cortex, the brain’s “emotional brake,” to pause before reacting. This leads to greater patience and less impulsivity in everyday life.  
• Dopamine reset: By stepping away from constant rewards, fasting recalibrates the brain’s reward system, fostering long-term focus and reducing dependency on instant gratification.
• Heightened mental stamina: The shift from glucose to ketones during fasting provides the brain with a cleaner, more efficient fuel source, cutting through brain fog and enhancing clarity.
• Stress system recalibration: Repeated cycles of fasting dampen the body’s stress response, helping you return to a calm baseline more efficiently after challenges.
• Mind-body awareness: Fasting separates biological hunger from emotional cravings, fostering a deeper understanding of how mood and habits are intertwined.